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Phase transitions in single-crystalline magnetoelectric LiCoPO4

Szewczyk, A.
Gutowska, M. U.
Wieckowski, J.
Wisniewski, A.
Puzniak, R.
Diduszko, R.
Kharchenko, Yu.
Kharchenko, M. F.
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Published in Physical Review. B, Condensed Matter. 2011, vol. 84, no. 10, p. 104419/1-104419/8
Abstract Specific heat, magnetic torque, and magnetization studies of LiCoPO4 olivine are presented. They show that a unique set of physical properties of LiCoPO4 leads to the appearance of features characteristic of two-dimensional Ising systems near the Ne´el temperature TN = 21.6 K and to the appearance of an uncommon effect of the influence of a magnetic field on the magnetocrystalline anisotropy. The latter effect manifests itself as a first-order transition, discovered at ∼9 K, induced by a magnetic field of 8 T. The physical nature of this transition was explained, and a model describing experimental dependences satisfactorily was proposed.
Keywords Phase transition (first-order phase transitions in single-cryst. magnetoelec. LiCoPO4)Heat capacityMagnetic torqueMagnetization (phase transitions in single-cryst. magnetoelec. LiCoPO4 studied via)Magnetic anisotropyMagnetic field effects (uncommon effect of magnetic field on magnetocryst. anisotropy of single-cryst. magnetoelec. LiCoPO4)
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Other version: http://link.aps.org/doi/10.1103/PhysRevB.84.104419
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SZEWCZYK, A. et al. Phase transitions in single-crystalline magnetoelectric LiCoPO4. In: Physical Review. B, Condensed Matter, 2011, vol. 84, n° 10, p. 104419/1-104419/8. https://archive-ouverte.unige.ch/unige:31077

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Deposited on : 2013-11-15

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